9-109867542-G-T

Variant names:

• chr9-109867542-G-T
• rs140452489
• NM_007203.5:c.97G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_007203.5(PALM2AKAP2):​c.97G>T​(p.Glu33*) variant causes a stop gained change. The variant allele was found at a frequency of 0.000000685 in 1,460,498 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: PALM2AKAP2 NM_007203.5 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.78
• Publications: 0 publications found

Genes affected

PALM2AKAP2 (HGNC:33529): (PALM2 and AKAP2 fusion) This gene belongs to the paralemmin downstream gene (PDG) family defined in PMID:22855693. Paralemmin downstream genes may have evolved contiguously with the paralemmin genes and are associated with other paralemmin paralogs in humans and several other taxa. The gene encodes three distinct protein isoforms, the PALM2 isoform, the AKAP2 isoform and the PALM2-AKAP2 isoform. The biological significance of the PALM2-AKAP2 isoforms is yet unknown. Earlier, PALM2 and AKAP2 were annotated as separate genes and PALM2-AKAP2 was annotated as a readthrough gene. [provided by RefSeq, May 2019]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_007203.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PALM2AKAP2	NM_007203.5	MANE Select	c.97G>T	p.Glu33*	stop_gained	Exon 2 of 11	NP_009134.1	Q9Y2D5-4
	PALM2AKAP2	NM_147150.3		c.97G>T	p.Glu33*	stop_gained	Exon 2 of 10	NP_671492.1	Q9Y2D5-6
	PALM2AKAP2	NM_053016.6		c.97G>T	p.Glu33*	stop_gained	Exon 2 of 7	NP_443749.5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PALM2AKAP2	ENST00000374530.8	TSL:2 MANE Select	c.97G>T	p.Glu33*	stop_gained	Exon 2 of 11	ENSP00000363654.3	Q9Y2D5-4
	PALM2AKAP2	ENST00000314527.9	TSL:1	c.97G>T	p.Glu33*	stop_gained	Exon 2 of 7	ENSP00000323805.4	Q9Y2D5-8
	PALM2AKAP2	ENST00000374531.6	TSL:1	c.103G>T	p.Glu35*	stop_gained	Exon 3 of 7	ENSP00000363656.2	Q9Y2D5-9

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460498 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 726656

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33424

American (AMR) AF: 0.00 AC: 0 AN: 44628

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26118

East Asian (EAS) AF: 0.00 AC: 0 AN: 39666

South Asian (SAS) AF: 0.00 AC: 0 AN: 86166

European-Finnish (FIN) AF: 0.0000190 AC: 1 AN: 52666

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5754

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111738

Other (OTH) AF: 0.00 AC: 0 AN: 60338

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.58	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	40
DANN	Uncertain	1.0
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.95
FATHMM_MKL	Uncertain	0.93	D
PhyloP100		4.8
Vest4		0.44
GERP RS		5.4
Mutation Taster		=25/175	disease causing (fs/PTC)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs140452489; hg19: chr9-112629822; COSMIC: COSV100092886;